Octane boosters - Toyota Nation Forum : Toyota Car and Truck Forums

TRDemon · 10-04-2005, 11:27 AM

hey guys whats up?
i just wanted to know if any of you guys uses octane boosters, if so which one works the best to you

Flashmn · 10-04-2005, 11:44 AM

Those octane boosters on the market wont raise the octane by much...

Just put toluene into the fueltank

***REN69*** · 10-04-2005, 12:01 PM

I asked this question about 2 months ago and got the same response.. basically they don't work as advertised, they only give you like a couple of points of octane rather than what they say.

Pineapple · 10-04-2005, 01:45 PM

Unless you tune the engine to use high octane, you're wasting your money. If you can't feel the different between 87 and 92 octane, don't bother.

abimanyu · 10-04-2005, 10:00 PM

I can feel the difference between premium and super for sure. The super premium has more "kick" and "punch." One product that worked for me was NOS Octane Booster with nitromethane.

Nismo Convert · 10-04-2005, 10:06 PM

The "octane boosters" only boost it .3 points, not 3 points, they constitute that as "points".

aaron7 · 10-06-2005, 02:07 PM

Right, so it would be like getting midgrade instead of regular. Just run premium if you want octane, unless you have modded your engine for more!

snakoil · 10-06-2005, 03:18 PM

for those of you saying they feel a difference between super and normal fuel just have great imagination.
Octane does not equal power!
Octane is just slows down the explosion in the engine. Higher octane fuel in standard compression engine will just make that some fuel won't be burned completely after the revolution and the gas will be expelled by the exhaust.
Higher compression engines like the 4age smallport need that higher indice d'octane shit 'cos it has 10.3 of compression ratio.
Don't waste your money on octane booster or high octane gas if you don't play with you timing or compression.

Pineapple · 10-06-2005, 04:17 PM

The different is more in automatic. Almost all manual I know can't feel a different. With different octane the auto acturally shift at different point. With higher octane it shift higher and it take less time to kick down.

Flashmn · 10-06-2005, 04:25 PM

Quote:

Octane is just slows down the explosion in the engine. Higher octane fuel in standard compression engine will just make that some fuel won't be burned completely after the revolution and the gas will be expelled by the exhaust.

Wrong wrong and wrong. Octane doesnt slow down anything, what it does it raises the tendency for knocking higher, meaning you can run more timing or higher compression and it wont knock as early as it would on lower octane. Higher octane fuel in a standard compression engine will work just as fine as lower octane fuel, but theres no power gained by changing octane.

Quote:

Higher compression engines like the 4age smallport need that higher indice d'octane shit 'cos it has 10.3 of compression ratio.

Stock smallports can run on low octane, atleast they do here. They're compression is 10.5:1 in the book.

***REN69*** · 10-06-2005, 04:30 PM

I run a mix of mid and high grade fuel in my 90 GTS, I don't think I feel a difference but you can tell the difference when running low octane. The guy who I bought it from was running regular and he didn't know he had to run premium until I told him (it was his cousin's car) after I ran all the regular out and put premium I could actually hear the difference when the motor ran.

Mins · 10-06-2005, 08:25 PM

My engine feels smoother- especially during idle and low rpm when I use premium opposed to regular. I have automatic. I would not use any octane booster since I dont trust any of them.

abimanyu · 10-07-2005, 08:30 AM

So it won't make any different if I fill up with Union 76 Racing Fuel (104 Octane I think)

Pineapple · 10-07-2005, 08:47 AM

Quote:

Originally Posted by Flashmn

Wrong wrong and wrong. Octane doesnt slow down anything, what it does it raises the tendency for knocking higher, meaning you can run more timing or higher compression and it wont knock as early as it would on lower octane. Higher octane fuel in a standard compression engine will work just as fine as lower octane fuel, but theres no power gained by changing octane.

Stock smallports can run on low octane, atleast they do here. They're compression is 10.5:1 in the book.

High octane gas is a longer CH chain. It does burn slower then lower octane gas.
With very low octane gas, the combustion happen so fast its like hitting the piston very hard with a hammer. The piston won't move fast because it doesn't have time to accelerate.
With a correct octane, the combustion will happen for a longer period of time. Its like pushing the piston down with force just until it hit bottom. This will give max power since the piston is accelerating all the time.
With a too high octane, the gas will burn too slow and still burning when the piston is moving up in exhaust stroke.

Koncking is when timing advanced too much combusted gas start to push piston down before it pass top dead center. That's why higher octane gas allow more advance without knocking.

Another explanation for high compression:
http://auto.howstuffworks.com/question90.htm

snakoil · 10-07-2005, 03:37 PM

thanks for calirifying this pineapple,,,maybe I didn't use the right terms to explain myself on my post. And here in canada all small port should run premium octane...it's written in your user manual book.